公开(公告)号：US20020008432A1

公开(公告)日：2002-01-24

申请号：US09899299

申请日：2001-07-06

申请人： MINEBEA CO., LTD.

发明人： Tadashi Akahori

IPC分类号： H02K005/16 ,  H02K007/08 ,  H02K011/00

CPC分类号： H02K5/1737 ,  F16C19/08 ,  F16C35/12 ,  F16C2370/12 ,  G11B19/2009 ,  H02K7/086

摘要： In a spindle motor in which its weight is decreased while maintaining the rigidity of a bearing to a large value, the widthwise dimension of a bearing cartridge assembly 11 is set so that the upper outer ring end portion 12b of the outer ring 12 of the bearing cartridge assembly 11 protrudes from a hub main body 6A. Since the lengthwise dimension of a hub 5A is smaller than that of a prior art, the weight and cost can be decreased that much. Further, the lengthwise dimension of the hub 5A is smaller than that of the prior art, a space portion is increased and the space portion can be employed as a space for arranging various kinds of members. Since the upper outer ring end portion 12b protrudes from the hub main body 6A, fitting pressure is not exerted on the upper outer ring end portion 12b of the outer ring 12 upon fitting, so that the generation of unnecessary deformation or the like can be avoided.

摘要翻译： 在将轴承的刚性保持在较大值的同时，其重量减小的主轴电机中，轴承座组件11的宽度尺寸被设定为使得轴承的外圈12的上外环端部12b 盒组件11从轮毂主体6A突出。 由于轮毂5A的纵向尺寸小于现有技术的尺寸，所以重量和成本可以降低很多。 此外，轮毂5A的纵向尺寸小于现有技术的长度尺寸，空间部分增加，并且空间部分可以用作用于布置各种构件的空间。 由于上外环端部12b从轮毂主体6A突出，所以在嵌合时不会对外圈12的上外环端部12b施加嵌合压力，能够避免产生不必要的变形等 。

公开(公告)号：US20040028301A1

公开(公告)日：2004-02-12

申请号：US10620224

申请日：2003-07-15

申请人： Minebea Co., Ltd.

发明人： Andreas Kull ,  Tadashi Akahori

IPC分类号： F16C032/06

CPC分类号： F16C33/1085 ,  F16C17/107 ,  F16C33/103 ,  H02K5/1675

摘要： A hydrodynamic bearing system, particularly for the rotary bearing of spindle motors to power hard disk drives. The bearing system includes a bearing sleeve, a shaft accommodated in an opening in the bearing sleeve and at least one radial bearing section provided between the bearing sleeve and the shaft with the aid of which the shaft and the bearing sleeve are supported rotatably in relation to each other. A bearing gap is formed between the shaft and the bearing sleeve and is filled with a liquid lubricant. A lubricant reservoir and equalizing volume independent from the design of the bearing arrangement is provided in that at least one duct is formed in the bearing sleeve that extends from an outer section of the bearing sleeve to the bearing gap and that is at least partially filled with lubricant.

摘要翻译： 一种流体动力轴承系统，特别适用于主轴电机的旋转轴承为硬盘驱动器供电。 所述轴承系统包括轴承套筒，容纳在所述轴承套筒中的开口中的轴以及设置在所述轴承套筒和所述轴之间的至少一个径向支承部分，所述轴和所述轴承套筒可相对于 彼此。 在轴和轴承套之间形成轴承间隙，并填充有液体润滑剂。 提供了一种独立于轴承装置的设计的润滑剂储存器和均衡体积，其中至少一个管道形成在从轴承套筒的外部部分延伸到轴承间隙的轴承套筒中，并且至少部分地填充有 润滑剂。

公开(公告)号：US20010054854A1

公开(公告)日：2001-12-27

申请号：US09876133

申请日：2001-06-08

申请人： MINEBEA CO., LTD.

发明人： Tadashi Akahori

IPC分类号： H02K007/08 ,  H02K007/00

CPC分类号： H02K5/1737 ,  G11B19/2009

摘要： In an outer rotor type spindle motor for driving a disc with a relatively long axial dimension for mounting a large number of the discs, it is possible to reduce part cost and assembling work cost while increasing a rotational precision. The stator is disposed on an opening surface of a drum portion of the rotor rather than between a pair of bearings within the drum portion. The stator coil end may be led to the outside of the drum portion without passing through the bearing to dispense with the conventional works such as a processing of a shaft, an insertion of a lead wire through a tubular hole and the like. Also, a bush between the drum portion and the bearing, which conventionally causes the degradation of the rotational precision and the increases in the cost for the parts and the assembling work, is dispensed with. In order to elongate the distance between the bearings and reduce the axial direction of the stator, a magnet material having a magnetic energy product that is higher than that generally used to this type of motor is selected.

摘要翻译： 在用于驱动具有相对长的轴向尺寸的盘的用于安装大量盘的外转子型主轴电机中，可以在提高旋转精度的同时降低部件成本和组装工作成本。 定子设置在转子的鼓部分的开口表面上，而不是在滚筒部分内的一对轴承之间。 定子线圈端部可以不通过轴承而被引导到鼓部分的外侧，以省去常规工作，例如轴的加工，通过管状孔等的引线的插入。 此外，通常导致滚筒部分和轴承之间的衬套，其通常导致旋转精度的降低以及零件的​​成本增加和组装工作。 为了延长轴承之间的距离并减小定子的轴向方向，选择具有高于通常用于这种类型的电动机的磁能产品的磁体材料。